The document outlines regulations for electrical safety in India. It discusses regulations for designating qualified personnel to operate electrical lines, maintaining safety records, inspecting electrical installations, providing earthing terminals and protective equipment, periodic testing, and other safety requirements for operating and maintaining electrical plants, transmission and distribution systems. Key requirements include deputing qualified designated persons, maintaining registration of such persons, inspecting installations, providing earth leakage protection, and ensuring periodic testing and maintenance of safety standards.

1. Presented by
Vivek Kumar Bhandari
Manager/Elect.

2.  OWNER: means company or body which owns
or operates or maintains electrical plants
and lines.

3.  Regulation-3: Supplier or owner shall
 Depute DESIGNATED person for the purpose to
operate and carry out work on electrical lines.
 Maintain register where the name and purpose of
DESIGINATED person shall be entered.
 No person shall be DESIGNATED unless he
possesses certificate of competency and his
name is entered in the register.

4.  Regulation -4:
Inspection of designated officer and other
safety items by Electrical Inspector.

5.  Regulation-5: Electrical safety officer.
 All suppliers of electricity and factories
registered under factory act 1948, where
more than 250KW of electrical load is
connected shall designate a person for
observance of safety provisions and for
inspection, ensuring testing and keeping
records.
 The qualification of this person: BE+ 10
/Diploma+15 (O&M electrical plants)

6.  Regulation-6 & 7: Operation and
maintenance of power plants & transmission
& distribution system
Supervisor: At least Diploma + Training under
schedule-I&II.
Technician: At least two year ITI course + Training
under schedule-I&II.
Syllabus and time of training

7.  Regulation-8,9,10: Records & inspection ,
Deposit of maps & deposit of printed copies
 Keeping records of map, plans, sections, related
to supply and transmission
 These are to be produced before electrical
inspector for inspection.

8.  Regulation-11: Plan of area of supply to be
made & kept open for inspection.
 Plan of area of supply depicting alignment and in
case of underground works, approx depth,
location etc in electronic formats.
 Plan to be corrected every year.
 Old plans to be converted into electronic formats
with in three years.
 GPS mapping to be done within five years.
 Plans free of cost to electrical inspector while on
fee basis to any applicant.

9.  Regulation-12: Safety requirements of
construction, installation, protection,
operation & maintenance.
 SUFFICIENT Fault current, insulation, mechanical
strength of equipments –- construction,
installation strength to ensure safety of human,
animals & property.
 Material and apparatus shall conform to relevant
specifications of Bureau of Indian standards

10.  Regulation-13 & 14: Service lines and
apparatus & Switchgears on consumers
premises.
 SUPPLIER - Healthiness of equipments on
consumers premises is to be ensured.
 Supplier shall provide suitable switchgear for
each service line within the consumers premises.

11.  Regulation-15:Identification of earthed and
earthed neutral conductors and position of
switchgear therein.
 Earthed conductor to be distinguished from live
conductors.
 NO link or switch in earthed conductor except when
switch isolates live and neutral conductors
simultaneously.
 Regulation-16:Earthed terminal at consumers
premises
 Suitable earthed terminal to be provided by supplier
at the point of commencement of supply.
 For installations of above 250 Volts, consumer in
addition to the supplier earth terminal shall provide
independent earthed electrode for own earthing.

12.  Regulation-17: Accessibility of bare
conductor.
 Bare conductors are not accessible.
 Provision of accessible position switches for
rendering them dead whenever necessary.
 Regulation-18:Danger notices in Hindi or
English and local language with sign of skull
and bones as per IS 2551
 For installations above 250V.
 At every motor generator transformer and
equipments used for controlling apparatus.
 All supports of equipments which can be climbed
upon without ladder used for voltage 650V.

13.  Regulation-19: Handling of electrical supply
lines and apparatus.
 Disconnecting the supply and discharging.
 DESIGNATED person with safety gears.
 Insulating mats complying with IS-15652:2006.
 Panel shall be painted with description of its
identification
 Regulation-20:Supply to vehicles and cranes.
 In case external supply is given to the moving
vehicle it is to be ensured that a control switch
shall disconnect the voltage in one operation.
 If moving vehicle is running on rails, these rails
shall be electrically continuous and be earthed

14.  Regulation-21: Cables for portable
apparatus.
 Insulated and protected from mechanical injury.
 Regulation-22: Cables protected by
bituminous material.
 Insulation and protection through SITU (producing
noxious and explosive gases on heating) has been
discontinued.

15.  Regulation-23: Street boxes.
 Provision of covers and doors and locks.
 Prevent influx of gas or water.
 Regulation-24 & 25: Distinction of different
circuits & Installations having more than one
feeds.
 Different circuits & installations with more than
one feed are readily distinguishable from one
another by means of indication of permanent
nature.

16.  Regulation-26: Accidental Charging.
 Ensuring no accidental charging to a voltage beyond
the limits intended for.
 Ensure that the AC & DC circuits installed on same box
do not come in the contact with each other.
 Regulation-27: Protective equipments.
 Fire buckets with dry sand & fire extinguishers at
substations and switching stations at convenient
location.
 Fire extinguishers to be tested every year & record
maintained.
 First aid boxes. One person trained in first aid
treatment shall be available during all working hours.
 At least two gas masks or more for 5MVA substations to
be used in event of fire or smoke. & Adequate no. for
below the 5MVA capacity.

17.  Regulation-28: Display of instruction for
resuscitation of person suffering from
electrical shock.
 Instruction in Hindi or English & in local language
of district.
 Designated persons are acquainted with and are
competent to apply these instructions.
 Artificial respirator at every station with voltage
exceeding 650V.

18.  Regulation-29: Alteration and repairs.
 No alteration, additions to existing installations except
by electrical contractor licensed in this behalf by state
govt.
 The work executed for or on behalf of central govt. Or in
any other case, centre govt. or state govt can exempt
these conditions by notifications in official gazette .
 Regulation-30: Periodical inspection and testing of
installations.
 Every installation above 650 volts - to be tested and
inspected at an interval of every 5 years either by
supplier or electrical inspector.
 When supplier is directed by central govt or state govt.
to inspect , report is to be submitted to Electrical
Inspector.
 Schedule IV Form I,II,III (Standard formats)

19.  Regulation-31: Testing of consumer
installations.
 New connection or reconnecting of supply after
six months , the supplier shall either test the
installation himself or accept the test results
signed by licensed electrical contractor.
 Regulation-32: Installation and testing of
generating units.
 Generating units of capacity shall be inspected by
Electrical Inspector before commissioning.

20.  Regulation-33 & 34: Precautions against
leakage.
 All equipments shall have IR value as specified in
IS standards.
 For < 650 Volts installations -500V megger-one
minute-1 Mega ohms.
 For > 650 Volts & < 33KV installations- 2.5 KV
megger -1 minutre-5 Mega ohms.
 Electrical Inspector can direct get the installation
tested and consumer shall have to facilitate it.

21.  Regulation-35: Supply and use of electricity.
 Control gear to carry and break the current shall
be placed near point of commencement of supply.
 For < 650 Volts Fuse or circuit breaker.
 For > 650 V -33KV installations- Fuse or CB but
(11KV-1000KVA & 33KV-2500KVA) else CB.
 >33 KV- CB.
 Every transformer of capacity 1000kVA shall be
provided with CB or linked fuse on primary side
and secondary side.
 All motors shall be prided with linked fuse or CB
or emergency tripping device

22.  Regulation-36: Supply and use of electricity
in building more than 15 meters in height.
 Elec. Insp. discretion of Govt.- Voltage and
Capacity.
 Isolating device at the commencement of supply
at a height not more than 1.7 meters.
 No other service pipes and cables shall be taken
along the ducts provided for laying power cables.
 Fire barriers at each floor crossing.

23.  Regulation-37: Installations of voltage
exceeding 250 Volts.
 All metal works other than conductors to be
earthed.
 Clear space of 1 meter in front of switchboard.
 Back space less than 20cm or more than 750
cm.(75 cm – clear passage of height 1.8 meters)
 Regulation-38: Appeal to Electrical Inspector.
 If supplier declines to commence the supply on
the grounds that the installation is defective, the
consumer may appeal to electrical inspector to
test the installation. EIG clears -24 hours supply
commencement.

24.  Regulation-39: Precautions against failure of
supply and notice of failures.
 Supplier shall take reasonable efforts to avoid
accidental interruption of supply and avoid
danger to public and DESIGNATED person.
 Failure of supply as per the nature decided by
electrical inspector may be communicated to
him.
 Standard Form given in schedule-IV

25.  Regulation-40: Test of resistance of
insulation.
 No reconnection without insulation resistance
measurement.
 Regulation-41: Connection with earth.
 Neutral of 3 Ph 4 Wire and earth of 2 Ph 3 wire
shall be earthed with two separate distinct
connections with min of two different electrodes.
 Interconnection of earth electrodes.
 Armour of cables shall be earthed at two distinct
points.
 No earth connection with the aid of water pipes.

26.  Regulation-41: Contd....
 Frame of Transformer, generator, motor shall be
earthed at two distinct points.
 3 pin type sockets with 3rd pin earthed.
 All earthing system shall withstand corrosion and
retain electrical continuity during life of installation.
The electrode and mesh shall carry fault current
without rise of temperature.
 All earthing shall be tested once every year on the
driest day.
 Regulation-42: Earth leakage protective devices
 Other than voltage 250 Volts and load below 5 KW
shall be controlled by earth leakage protective
devices.

27.  Regulation-43: Approval by electrical inspector.
 Voltage above which electrical installation is to be inspected is
to be notified by Appropriate Govt.
 Installation exceeding 650Volts who makes addition or
alteration – supply connection Electrical Inspector approval.
 Regulation-44: use of electricity at voltage exceeding
650V.
 Safety clearances for electrical apparatus as per IS.
 Minimum safety working clearances
KV meters
25 2
36 2.8
72.5 3.1
145 3.7
245 4.3

28.  Regulation-44: Contd....
 Safe working clearance: is the minimum clearance to be
maintained between the live part of the equipment on one hand
and earth or another piece of equipment or conductor on which
it is necessary to carry out the work , on the other hand.
 The apparatus with more than 2000 litres of oil not to be
installed in basement where oil drainage can not be provided.
 More than 2000 litres of transformers – baffle wall with four hour
fire rating if adequate clearance is not available.
 More than 9000 litres – soak pit with arrangement of drainage
and extinguishing of fire in case of ignition.
 Only dry type transformers be used inside the residential and
commercial buildings.
 More than 10MVA capacity transformers. Fire fighting system as
per IS 3034 or nitrogen injection fire protection system.

29.  Regulation-44: Contd....
 Substation in basement:
 Room shall necessary be in first basement.
 2 hour fire rated doors and shall be kept closed.
 Cable sealing of Pr. And Sec. Side of transformers at all
floor and wall openings to be of 2 hour ratings.
 FRLS cables of two hour rating to be used.
 More than 10MVA capacity transformers. Fire fighting
system as per IS 3034 or nitrogen injection fire
protection system.
 All apparatus shall be protected against lightening
and for voltages above 220KV, against switching
surges.

30.  Regulation-45: Interlocks and protection.
 Interlocks
 Isolator and circuit breaker.
 Isolator and earth switch.
 Interlock to avoid paralleling if supplies are not intended to be
parallel.
 Inter tripping between HV and LV side in case of paralleling of
transformers.
 All doors giving access to live parts shall be interlocked so that
that access is possible only after making live part dead and
earth.
 Protection
 50/51,50n/51n,PRV, OTI, WTI for >1000KVA Transformers
 >10 MVA- 87T,
 >132 KV 87B, LLB
 Grid substation : disturbance recorder and event logging.
 Distance protection and carrier communication protection at
400KV level.

31.  Regulation-46: Testing , operation and
maintenance.
 If required by inspector , Manufacturers test reports
for routine tests before approval by electrical
inspector.
 Site test reports for new apparatus or apparatus
disconnected for more than six months.
 Records of all tests and tripping to be maintained for
future comparisons.
 Failures of transformers of capacity more than 20MVA
to be reported to CEA with reasons with in 48 days.
 Standard Format in schedule IX
 Regulation-47: Protection against leakage in
cables
 Armour/sheaths shall be continues and connected with
earth.

32.  Regulation-48: Connection with earth.
 All metallic and non current carrying parts to be
connected to mat:
 to limit step and touch potential.
 Protective devices remain effective.
 Neutral of star connected devices to be earthed
with two separate connections.
 Regulation-49: Conditions as to transform
and control electricity.
 Fencing of not less than 1.8 meter height.

33.  Regulation-50: Pole type substation.
 Regulation-51: Condensers
 Regulation-52: Luminous tube signs
 Regulation-53: Supply to electrode boiler
 Regulation-54: Supply to X-ray

34.  Regulation-55: Material & strength.
 Regulation-56: Max stress and factor of
safety.
 Regulation-57: Clearances above ground.
Voltage Across/along street Clearance in meters
650-33 kv across 6.1 m
>33KV Across/along Max( 6.1,5.2+0.3m/33KV)

35.  Regulation-59: Clearances between conductors
trolley wires.
 Regulation-60 & 61: Clearances from building of
lines.
Voltage Above/adjacent to
building
Clearance in meters
< 650 above 2.5 m from highest point of
building
< 650 adjacent Horizontal clearance of 1.2
m (max deflection)
> 650 – 33KV above 3.7 m
> 33KV above 3.7+.03/33KV
>650 – 33KV adjacent 1.2 m
> 33KV adjacent 2 + .3/33Kv

36.  Regulation-62-75: Transmission lines.
 Regulation-76: Laying of cables
 power cable of voltage >33KV be laid at a
minimum depth of 1.2 m.
 Separation between power cable> 33KV and
communication line shall be 0.6 meters.
 Regulation-77: Protection against
electromagnetic interference
 Power line of voltage exceeding 11KV shall get
PTCC clearance

37.  “Nothing in this chapter shall apply to
electricity used for public carriage of
passengers, animals, or goods on , or lighting
or ventilation of the rolling stock of any
railway or tramway subject to the provision
of railway act.”

39.  Regulation-116: Deviations
 State govt or centre govt may written order give
deviation to these regulations except regulation-
30.
 Electrical inspector by order in writing can allow
deviations in respect of matters referred in
regulation as specified in the clause